Yeah, Gary, those fins on the back make it kind of difficult, don't 
they!  (big smile)

Tom Behler: KB8TYJ

----- Original Message ----- 
From: "Gary Tillinghast" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, June 01, 2012 10:51 PM
Subject: Re: Could it be time to replace My old trusty Astron RS35 Power 
Supply?


> Hi Tom, Sounds like it.  makes a great Father's day gift.  It is hard to 
> put
> into a stocking.  HY HY.  Gary KB2YAA
> ----- Original Message ----- 
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, June 01, 2012 9:54 PM
> Subject: Could it be time to replace My old trusty Astron RS35 Power 
> Supply?
>
>
> Hi, folks.
>
> I know we have had similar discussions on the list before, but tonight I
> feel I have discovered something that may be of interest to others.
>
> Basically, over the past few days, I have found that even when 
> transmitting
> on the resonant frequency of an antenna with a 1.0 to 1 SWR, my TS590 
> seems
> to fold back to an output power of approximately 50 watts.  These power
> readings have been obtained from both the meter on the TS590, and my TW1
> talking watt meter.
>
> I thoroughly checked all coax and DC power connections, but everything
> seemed ok.
>
> I measured the power supply's voltage first with no load, and it was 13.35
> volts consistently.  However, when I transmitted in RTTY mode with 100
> watts, thereby putting a full load into the circuit, the DC voltage 
> readings
> started fluctuating all over the place.  They ranged from a high of 10
> volts, to as low as 2 or 3 volts.  Then, on a whim, I connected the 
> Kenwood
> PS53 power supply that I got with the Kenwood 570 I purchased from the
> estate sale in our area, and the output power readings were a very solid 
> 100
> watts, even when the rig was keyed down continuously for several minutes.
>
> I know there is a way to adjust the voltage in the RS35, but with the
> foldback of the ts590, and the fluctuations in voltage readings, I'm now
> getting a bit nervous about using the RS35 as my main supply.
>
> Does anyone have any thoughts or similar experiences to report?
>
> If I do need to be in the market for a new power supply, I have several
> requirements:
>
> 1.  I'd like it to be a linear supply
>
> 2.  I'd like it to be something that could deliver at least 40 amps
> continuously through my rigrunner, because I sometimes run the TS590, my
> TMV71A, and my TMV7A packet set-up simultaneously.
>
> If anyone has specific suggestions regarding a supply that I might wish to
> consider, please let me know.
>
> 73 from Tom Behler: KB8TYJ
>